Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
After
Before
AfterFast, Reliable Roof Installation Across Santa Rosa
Roof installation in Santa Rosa, CA typically runs $11,000 – $22,000 for a full composition shingle replacement, and $16,000 – $28,000 for standing seam metal or high-end architectural systems. Most projects take 3 – 7 working days once materials arrive, though lead times on specialty shingles and TPO membrane are running 2 – 5 weeks across Sonoma County right now. If your roof is leaking or your insurer is asking for documentation, call (743) 200-8347 and we’ll get a written price to you before anything is ordered.
We know the roofs on Coffey Park ranches, Fountaingrove hillside builds, and the 1950s flatland subdivisions off Piner Road and Fulton Road. We know which ones have failing starter strips and which ones need a full deck inspection. More importantly, we know what Santa Rosa homeowners are up against when an insurance renewal letter lands in the mail.
Why Mercer Roofing Is Santa Rosa’s Preferred Roof Installation Company
Santa Rosa homeowners choose Mercer Roofing because we solve the problem most roofers ignore: the stranger-at-the-door risk. Before our technician arrives, you get their name and photo sent to you. When they knock, they’re in a clean, marked uniform and they hand you a photo ID badge. Every Mercer technician is background-checked, identity-verified, and dispatched under the Threshold Verified standard, which each independently owned Mercer location is contractually held to. The person on your roof is someone you can vet before they ever step on your property.
Our Santa Rosa customers tell us the same thing after the job: the price they approved was the price they paid. That’s because we put every figure in writing before a single nail is driven. No change orders, no surprise line items. For homeowners who want certainty alongside craftsmanship, that’s the whole point.
Grant Whitlock leads our crew, and he’s the one who signs off on every Santa Rosa roof installation. Founded in 2000, Mercer Roofing is part of the Threshold Group family of home-service companies. We’re not a franchise that parachutes in from another market. We carry manufacturer-recognized shingle brands including GAF, CertainTeed, and Owens Corning, and we stock common flashing and underlayment locally so Santa Rosa jobs don’t stall waiting on parts.
The 365-Day Done Right Promise backs every installation we do. If the work isn’t right within a year, Mercer makes it right. That’s written in your contract, not just said over the phone.
TPO Roofing Installation in Santa Rosa
TPO Roofing Installation in Santa Rosa runs $9 – $14 per square foot installed on low-slope and flat roof sections, which works out to roughly $11,000 – $18,500 on a typical 1,200-square-foot Santa Rosa ranch addition or flat-roof garage. TPO is a heat-welded single-ply membrane that’s become the standard for low-slope roofs across Sonoma County because it holds up to the thermal cycling Santa Rosa’s wet winters and dry summers create.
We see TPO requested most on post-2017 rebuilt homes in Coffey Park and Fountaingrove that carried flat garage roofs or shed dormers through the fire rebuilds. Those membranes are now hitting the five-to-seven-year mark too, and the seams that were welded in 2018 and 2019 are starting to show fatigue where the Petaluma Gap wind-driven rain finds every weak point.
What the Job Involves
A TPO installation starts with removing the old membrane down to the decking. Then we inspect for moisture damage and install new insulation board, fasten it per manufacturer spec, and heat-weld the TPO membrane at every seam and penetration. The welded seams are what make TPO watertight, and they’re also what fails first if the original installer rushed the weld.
When a Santa Rosa Homeowner Needs TPO
You need a TPO roof when your flat or low-slope section is older than eight years, showing membrane cracks, ponding water, or failing seam tape. Santa Rosa insurers are also asking homeowners to document that flat sections meet current fire and energy codes before they’ll renew. If you’re getting that letter, call (743) 200-8347 and we’ll inspect it and put a written price in your hands.
Shingle Roof in Santa Rosa
Shingle Roof installation in Santa Rosa runs $11,000 – $22,000 for a full architectural shingle replacement on an average 1,600-square-foot ranch, depending on tear-off, decking condition, and the shingle brand you choose. Architectural shingles from GAF, CertainTeed, or Owens Corning carry 130 mph wind ratings and Class 4 impact resistance, which matters in a city where the Petaluma Gap sends wind-driven rain against eaves and flashing points.
Most Santa Rosa homes are still composition shingle. The pre-fire stock built in the 1950s through 1980s, especially in neighborhoods like Northwest Santa Rosa near Coddingtown Mall and the flatlands south of Highway 12, often carries shingles that were installed before current fire-rating codes took effect.
Full Tear-Off and Re-decking
A full tear-off means removing every layer down to the decking so we can see what’s actually underneath. On older Santa Rosa homes, we regularly find swollen sheathing from years of wind-driven rain intrusion at roof-to-wall flashing points. We replace any compromised decking, install synthetic underlayment, and re-detail every valley and penetration to current code before the shingles go down.
Overlay vs. Tear-Off
We don’t do overlays on Santa Rosa homes that will need an insurance inspection. California’s wildfire building codes and most insurers want to see the full assembly, not shingles layered over old problems. A tear-off costs more up front, but it’s the only way to document that your roof actually meets what your carrier is asking for.
Trusted Brands We Service in Santa Rosa
We install and repair roofing systems using manufacturer-recognized shingle brands: GAF, CertainTeed, and Owens Corning are the three we recommend most often for Santa Rosa homes. GAF’s Timberline HDZ architectural shingle carries the 130 mph wind rating that Fountaingrove and hillside homeowners routinely need for insurance sign-off. CertainTeed’s Landmark line offers the widest color range for HOA-governed rebuild neighborhoods. Owens Corning Duration is our go-to when homeowners want the SureNail strip for extra grip during wind storms. We keep common flashings, ridge vent, and underlayment stocked locally so your Santa Rosa roof installation doesn’t sit idle waiting on a truck from a regional warehouse. When you call for a free estimate, we’ll walk you through the differences and put your exact price in writing before anything gets ordered.
Common Roof Installation Problems We See in Santa Rosa Homes
- Expiring starter strip warranties on Coffey Park rebuilds. The roughly 1,400 homes rebuilt between 2018 and 2022 are crossing the 5 – 7 year mark at the same time. Manufacturer warranties on underlayment and starter strips are expiring citywide in a single window that exists nowhere else in Sonoma County.
- Insurance-driven fire-rating failures on pre-fire homes. 1950s – 1980s flatland ranches with aging composition or wood shake roofs fail High Fire Hazard Severity Zone requirements. We see homeowners dropped by insurers before any storm damage is even visible.
- Thermal expansion cracking. Wet winters followed by prolonged dry heat cause significant expansion and contraction. Aged shingles already stressed by wildfire ember exposure crack fastest at valleys and penetrations that were never re-detailed to current code.
- Wind-driven rain intrusion at flashing points. The Petaluma Gap channels coastal marine air and high winds into Santa Rosa more aggressively than into neighboring inland cities. Homes with degraded underlayment leak at eaves and flashing points in the first heavy wind-driven rain of the season.
Pricing for Roof Installation in Santa Rosa, CA
A full roof installation in Santa Rosa runs $11,000 – $22,000 for architectural shingles, and TPO flat sections add $9 – $14 per square foot. Standing seam metal starts around $16,000 and climbs with complexity. What moves the number: decking replacement, roof pitch, number of valleys and penetrations, and whether you need Class A fire-rated assembly documentation for insurance. We put the exact price in writing before we order a single bundle. That means the long-lead shingle shipment and any material price shifts never touch your final number. Call (743) 200-8347 for a free estimate with a fixed written price.
We Also Serve Cities Near Santa Rosa
Mercer Roofing serves Santa Rosa and the surrounding communities of Sebastopol, Windsor, Rohnert Park, and Cotati. If you’re in one of those areas and need a Roof Installation quote, call (743) 200-8347 and we’ll put a written price together. Our crews coordinate scheduling from our Bay Area office, but the work is done by local Santa Rosa technicians who know Sonoma County roofs.
Serving Santa Rosa, CA - Our Local Coverage Area
We’re based in the Santa Rosa area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Roof Installation in Santa Rosa
Most roof installations in Santa Rosa take 3 – 7 working days once materials are on site, but lead times on specialty shingles and TPO membrane are running 2 – 5 weeks across Sonoma County right now. The calendar is set by material availability, not labor. Call (743) 200-8347 and we’ll give you a realistic timeline for your specific roof and the materials you want, along with a written fixed price before we order anything.
Your Coffey Park home was rebuilt to post-fire code, but the manufacturer warranties on original underlayment and starter strips are now expiring or already lapsed. We’re seeing the entire rebuild cohort cross the 5 – 7 year mark at the same time, which means small failures at flashing points and valley details are appearing citywide in a single window. A roof inspection now catches those before a leak does. Call (743) 200-8347 to schedule one.
Yes. Homes in High Fire Hazard Severity Zones, which include much of Fountaingrove, Rincon Valley, and the eastern hillsides, must comply with California’s Class A fire-rated roofing requirements under post-Tubbs Fire codes. Even if your home is not currently being inspected, many Santa Rosa insurers now require documentation of fire-compliant materials before they’ll renew a policy. We document every square of your new roof for your insurer, and we’ll put the fire-rating compliance in writing.
We install ice and water shield membrane in valleys and at all roof-to-wall flashing points, re-detail every penetration, and verify drip edge is properly seated so wind-driven rain can’t sneak in at the eaves. The Petaluma Gap sends coastal marine air and high-wind events into Santa Rosa more aggressively than into neighboring inland cities, so we treat wind-driven rain as a structural threat, not an afterthought. Each flashing point gets checked twice before the final inspection. Call (743) 200-8347 and we’ll show you exactly what we do differently.
Yes. Every Mercer Roofing project starts with a written fixed price before any work starts or any materials are ordered. That’s standard on every job we do in Santa Rosa, not an add-on. If a shingle shipment takes five weeks to arrive and prices move in that window, your number doesn’t change. The 365-Day Done Right Promise also applies to every installation: if the work isn’t right within a year, Mercer makes it right. Call (743) 200-8347 for your free estimate.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Santa Rosa and Sonoma County since 2000.
Ready for a roof installation quote in Santa Rosa? Call (743) 200-8347 now. A live person answers 24/7, and we’ll get a written fixed price in your hands before a single bundle is ordered.